Martin & Pleasance Schuessler Tissue Salts Ferr Phos: First Aid - A Homeopathic remedy traditionally used for the temporary relief of: inflammation, redness, throbbing and the first stage of respiratory ailments. Iron Phosphate – Ferr Phos plays a role in the creation of energy in the cells. It gives strength and toughness to the circular walls of blood vessels, especially the arteries. We must always remember that freely circulating oxygen rich blood is essential to health and life.